Commodity Sales Data Processor System Having Camera for Picking Up User Image and USB Storage Device Connector for Storing Date and Time of User Transactions

1. A commodity sales data processor, comprising: a user interface for commodity sales having an information input function; a camera picking up an image of an area embracing a user positioned in a position where the user can operate the user interface and outputting picked-up image data; a data transmitting and receiving unit allowing a storage device for rewritably storing data to be connected and enabling data communication with the storage device; a display unit configured to display the user interface; and an information processing unit which executes: a detecting process of detecting connection of the storage device to the data transmitting and receiving unit; a process of storing the date and time of detection of the connection in a predetermined storage area; a process of, when the connection is detected, controlling and causing the camera to pick up an image and storing picked-up image data outputted from the camera and shooting date and time together in the storage area; a process of displaying a picked-up image based on the picked-up image data outputted from the camera on the display unit; a process of displaying names of sign-on users on the display unit; and a process of displaying a predetermined warning message indicating that the picked-up image is stored with the picked-up image based on the picked-up image data on the display unit, wherein the information processing unit successively executes the detecting process and the process of displaying the picked-up image; wherein the information processing unit carries out a process of controlling access to data in the storage area; and wherein the data transmitting and receiving unit is a USB port, wherein the storage device is a USB memory having a USB connector connectable to the USB port, and wherein the camera is disposed in such a position that an image of an area embracing a user positioned in a position where the user can operate the USB port can be picked up.

2. A monitoring method for a user of a commodity sales data processor, comprising: detecting connection of a storage device for rewritably storing data to a data transmitting and receiving unit by an information processing unit, wherein the data transmitting and receiving unit allowing the storage device to be connected and enabling data communication with the storage device; storing date and time of detection of the connection in a predetermined storage area by the information processing unit; when the connection is detected, controlling and causing a camera to pick up an image and storing picked-up image data outputted from the camera, together with shooting date and time, in the storage area by the information processing unit, wherein the camera picking up an image of an area embracing a user positioned in a position where the user can operate a user interface having an information input function; displaying a picked-up image based on the picked-up image data outputted from the camera on a display unit having an information display function by the information processing unit in succession to the detecting; displaying names of sign-on users on the display unit; displaying a predetermined warning message indicating that the picked-up image is stored with the picked-up image based on the picked-up image data on the display unit by the information processing unit; further comprising controlling access to data in the storage area by the information processing unit; and wherein the data transmitting and receiving unit is a USB port, wherein the storage device is a USB memory having a USB connector connectable to the USB port, and wherein the camera is disposed in such a position that an image of an area embracing a user positioned in a position where the user can operate the USB port can be picked up.